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Date: Thu, 05 Jun 2008 10:40:48 +0200
From: Jes Sorensen <jes@sgi.com>
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To: Jesse Barnes <jbarnes@virtuousgeek.org>
Subject: Re: MMIO and gcc re-ordering issue
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Cc: linux-arch@vger.kernel.org, Nick Piggin <nickpiggin@yahoo.com.au>,
	Roland Dreier <rdreier@cisco.com>, linux-kernel@vger.kernel.org,
	Jeremy Higdon <jeremy@sgi.com>,
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	tpiepho@freescale.com, alan@lxorguk.ukuu.org.uk,
	Arjan van de Ven <arjan@infradead.org>
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Jesse Barnes wrote:
> Now, in hindsight, using a PIO write set & test flag approach in 
> writeX/spin_unlock (ala powerpc) might have been a better approach, but iirc 
> that never came up in the discussion, probably because we were focused on PCI 
> posting and not uncached vs. cached ordering.

Hi Jesse,

I am going to take a stab at implementing this so we can see how much
of an impact it will have.

Cheers,
Jes